To me, American Girls is also about fame. The music video makes it about stunts for sure. But I think when he says “my friends are in love with American girls” he might be referring to how other people in his orbit benefit immensely from his fame.
If Harry had stayed in England, and become a lawyer or something, how many of his friends would know American women?
He’s also saying “oh baby not me” lol. He’s not in love with American girls, his friends are. It’s all he’s heard about, he’s seen it all over the world- he’s an outsider to it- he doesn’t feel that. He understands their beauty, he gets the appeal, but he’s not into it. “Your temptations/don’t deny her frustrations” I think that means he’s seen some GORGEOUS women that *would be* tempting to him- but they just don’t do it for him. And that must be (and is, we’ve seen it) very frustrating to the women who get paraded around a famous man like Harry.
And “I’ve known you for ages” Harry has been told to care about what American girls think since he was… *checks notes* 17?
This is another song where I think Harry is using a mixed metaphor (man couldn’t be straightforward if his life depended on it) to discuss fame and his life as a closeted person. Other people are benefitting from a world he himself doesn’t participate/have an interest in- and those people were only in that world to start with because of him and his fame.